Syringe



PATENT JAMES HARDMAN, JR, OF BELLEVILLE, NEW JERSEY.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 523,345, dated July 24,1894. Application filed November 7, 1893. Serial No. 490,305. (Nomodel.)

To aZZ whom it may concern.-

Be itknown that I, JAMES HARDMAN, Jr., a citizen of the UnitedStates,.residin g at Belleville, in the county of Essex and State of NewJersey,have invented certain new and useful Improvements in Valves forSyringes, Atomizers, &c. and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form apart of this specification.

My present invention relates to improvements in valves for syringes,atoinizers and the like, and consists essentially in the novelconstruction and form of valve shown and described, and the inventionfurther consists in and outlet valve of my novel form of construction,all of the parts being illustrated in front elevation. Fig. 2 is alongitudinal vertical section of said reservoir-or bulb and its valves,clearly illustrating the arrangement and construction of the severalparts of the valves. Fig. 3 is a front view of atube drawn into shape toform what is termed the necking forming the seat for the valve. Fig. 4is a vertical section of said tube and its valve, but illustratingaslightly different means for retaining the valve within the tube. Fig. 5is a side view and Fig. 6 a plan of the valve employed; and Figs. 7 and8 are aside view and plan respectively, of a valve of a slightlymodified form of construction. 1

Similar letters of reference are employed in each of the above describedviews, to indicate corresponding parts.

In said drawings, B indicates an air-reservoir made from flexiblematerial, such as rubher, for a syringe, said bulb being provided withthe usual form of inlet tube b and out let tube 1), as will beunderstood. Connecting said tube 6 with thereservoir B is the inletvalve A, and connecting said tube 1) with said reservoir Bis the outletvalve A, as will be clearly seen from Fig. 1. Said valves A and A whichform the novel part of my present invention, are both of a similarconstruction, except that they are differently arranged in the necks band b of said reservoir or bulb B, to form a suction valve in the oneend, and a force valve in the other end of the bulb.

The construction and arrangement of the valve is as follows: The partscomprising the valve casing consist of a shell (1, of any ornamentalshape, being preferably drawn or spun into shape to form a metal tube,but said shell may be made of hard rubber, if desired. The one end a ofsaid shell or tube is slightly smaller in diameter than the upperportion and is bent inwardly, as at 01, and provided with a shoulder (1which serves as a stop for the end of the tubing 1) or b forced intothis portion of the casing a. The upper portion of said casing is forcedinto one of the necks b or b of the air reservoir and is held or securedthereon, preferably. by means of an annular flange a, substantially asillustrated. Connecting either of the necks in said reservoir B with oneof the tubesb or b is the main valve chamber 0, which is preferably spunup from tubing and isprovided at its ends with the annular flanges orrims c and a respectively, by means of which said tube is securely heldby the inner surfaces of the openings in said necks b and b and saidtubes 1) or b' Said valve chamber, in being spun up, is formed with asuitable indenta tion 0 termed a necking, which forms a seat 0 for thevalve 6, loosely arranged in said .chamber a.

The valve may be of the construction illustrated in Figs. 2, i, 5 and 6,being provided with a stem or post e, or the valve may be provided withthe arm 6 radiating toward the circular edge of the inclined orcone-shaped valve, as clearly shown in Figs. 7 and 8. By thisarrangement of the radiating arms 6 the valve can be retained morecentrally on the valve seat 0 but the construction of the valve shown inFigs. 5 and 6 is equally as good.

As will be seen from Fig. 2, in order to pre vent the valve fromdropping from the valve chamber 0, a wire loop (1 made from spring wireis forced into the end of the chamber a and the free ends of said loopd, which is preferably U-shaped, are sprung or forced into the annularrecess a formed by the rim substantially as illustrated in Fig.2. Thisis a very good and simple means for retaining the valve within thechamber a when the air reservoir B is compressed.

Another arrangement of retaining the valve within the valve chamber 0 isillustrated in Fig. 4:, and consists simply in providing the tube a withoppositely arranged holes and securing a piece of wire or a pin, as d*,across the valve chamber.

When the bulb B is compressed, by the arrangement of the valves A and Ain the opposite necks b and b of said bulb, the valve Ais forced shutallowing the liquid contained in the bulb to force the valve A open, andwhen the bulb is again released, and allowed to retain its normal shape,then the valve A is closed automatically, while the valve A opens toallow the entrance into the bulb B of a new supply of liquid.

I prefer to make the several parts or fittings comprising the valves,from sheet metal, being drawn out by means of proper tools, saidfittings being made from a ductile and non-corrosive metal, such asaluminum.

Of course the fittings may be made of brass or any other suitable metal,and may be polished or nickel-plated.

Having thus described my invention, what I claim is- 1 1. In a syringeor atomizer, the herein de scribed valve comprising therein, a shell 0,,a valve chamber 0 provided with a necking c forming a valve seat, avalve on said seat, and a wire loop having the ends d thereof inengagement with an annular recess 0 to prevent the displacement of saidvalve from said valve chamber, substantially as and for the purposes setforth.

2. In a syringe or atomizenthe herein described valve comprisingtherein, a shell at, having an inwardly turned portion a provided withan annular shoulder a a valve chamber cprovided with a necking cforminga valve seat, a valve on said seat, and a wire 100p having the ends (1thereof in engagement with an annular recess 0 to prevent thedisplacemeut of said valve from said valve chamber, substantially as andfor the purposes set forth.

In testimony that I claim the invention set forth above I have hereuntoset my hand this th day of September, 1893.

JAMES HARDMAN, JR.

Witnesses:

FREDK. C. FRAJZINTZEL, WM. H. CAMFIELD, Jr.

